摘要
GPS测量、地图的手工数字化以及扫描是目前为GIS-T采集和更新空间数据的主要手段.在按照上述方法采集数据时,道路几何线型通常以离散的坐标串的形式予以表达.交通运输部门在日常工作中所管理的各种属性数据通常按照里程建立与其空间位置之间的联系.在应用GIS概念和技术解决交通运输问题时需要构造高精度的线性参照系,因此需要研究三维或二维坐标与一维里程之间的转换模型,以实现坐标与里程之间的—一对应,达到快速信息查询、分析与表达的目的.通过对道路几何线型特性的研究,提出了按照斜率、斜率差和斜率差的变化率识别道路几何线型,进而构造数据转换模型和线性参照系的实用方法;;并通过对相位GPS测量和数字化采集道路几何线型数据的实例分析,证明了上述方法的实用价值和技术上的可行性.
Due to the reason that the observations of GPS and map digihzation are 3D or 2D cooldinates and that thehighway attributes are related to their spatial peihons by mileage, the transfonnation medels betWeen cooldinates andtheleage are needed to develop. The authors presented a methedology for the highway alignment recognition which canbe used as the basis to establish high accuracy on. Relevant algorithm are demonstrated for ac medeling whenphase GPS and map digitization ~ adopted. At the end of the poper, two real - life examples are illustrated by usingthe above aleorithln and foe feaSibility of this method is also proved.
出处
《同济大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
1999年第5期603-607,共5页
Journal of Tongji University:Natural Science
关键词
公路
地理信息系统
数据转换模型
坐标
里程
highway geographic infonnation system
transformation model
slope change
nonlinear equation